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<h4 class="subsection" id="MicroBlaze-Function-Attributes-1"><span>6.33.17 MicroBlaze Function Attributes<a class="copiable-link" href="#MicroBlaze-Function-Attributes-1"> &para;</a></span></h4>

<p>These function attributes are supported on MicroBlaze targets:
</p>
<dl class="table">
<dt><a id="index-save_005fvolatiles-function-attribute_002c-MicroBlaze"></a><span><code class="code">save_volatiles</code><a class="copiable-link" href="#index-save_005fvolatiles-function-attribute_002c-MicroBlaze"> &para;</a></span></dt>
<dd><p>Use this attribute to indicate that the function is
an interrupt handler.  All volatile registers (in addition to non-volatile
registers) are saved in the function prologue.  If the function is a leaf
function, only volatiles used by the function are saved.  A normal function
return is generated instead of a return from interrupt.
</p>
</dd>
<dt><a class="index-entry-id" id="index-break-handler-functions"></a>
<a id="index-break_005fhandler-function-attribute_002c-MicroBlaze"></a><span><code class="code">break_handler</code><a class="copiable-link" href="#index-break_005fhandler-function-attribute_002c-MicroBlaze"> &para;</a></span></dt>
<dd><p>Use this attribute to indicate that
the specified function is a break handler.  The compiler generates function
entry and exit sequences suitable for use in an break handler when this
attribute is present. The return from <code class="code">break_handler</code> is done through
the <code class="code">rtbd</code> instead of <code class="code">rtsd</code>.
</p>
<div class="example smallexample">
<pre class="example-preformatted">void f () __attribute__ ((break_handler));
</pre></div>

</dd>
<dt><a class="index-entry-id" id="index-fast_005finterrupt-function-attribute_002c-MicroBlaze"></a>
<a id="index-interrupt_005fhandler-function-attribute_002c-MicroBlaze"></a><span><code class="code">interrupt_handler</code><a class="copiable-link" href="#index-interrupt_005fhandler-function-attribute_002c-MicroBlaze"> &para;</a></span></dt>
<dt><code class="code">fast_interrupt</code></dt>
<dd><p>These attributes indicate that the specified function is an interrupt
handler.  Use the <code class="code">fast_interrupt</code> attribute to indicate handlers
used in low-latency interrupt mode, and <code class="code">interrupt_handler</code> for
interrupts that do not use low-latency handlers.  In both cases, GCC
emits appropriate prologue code and generates a return from the handler
using <code class="code">rtid</code> instead of <code class="code">rtsd</code>.
</p></dd>
</dl>

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